Logic Problems:

Kitten Litter

Grid-based Logic

Cindy’s cat, Precious, had a litter of seven kittens last month. Cindy’s family decided that they would keep just two of the kittens and so reluctantly they found homes for the other five. By happy coincidence...

BRYLine:

Beginner 2

Logic: Shapes & Colors

Fill out all the cells in the line with the nine colored shapes, one shape per cell, in accordance with the clues

Geomatrix:

Advanced 1

Geometry & Deduction

Discover which one of the four dots surrounding a given letter is in fact the real one so that when all dots are assigned, all the clues are satisfied

Cut-Outs:

The Origami Flexatube

DIY, Hands-on

Cut out the pattern. Glue at the opposite ends into a tube, and achieve... two different goals

Matchsticks:

Rhombuses Getrid

Segment-based geometry, hands-on

In plane Euclidean geometry, a rhombus is a quadrilateral whose four sides all have the same length. Another name is equilateral quadrilateral, since equilateral means that all of its sides are equal in length

Puzzle Stories:

Elevator Exercise

Deduction, Reasoning, Spatial

Larry lives on the 50th floor of a skyscraper. He gets up very early—earlier than anyone else in the building—and, obviously, must reach the ground floor to go to work. Naturally, he uses the elevator, but at the hour he wakes up, the elevator is always on the ground floor...

Kolocells:

Intermediate 2

Logic: Colors

An arrangement is composed of an even number of circles. Paint each circle in one of the three prime colors in accordance with the clues provided